Portable Inflator For Tyre

ABSTRACT

A portable inflator for tyre includes: a top cover, a bottom cover attached to the top cover, a pressure gauge, a switch and an accessories cover, the pressure gauge, the switch and the accessories cover being placed into the corresponding hole and trough which are defined in the top of the top cover and the bottom cover, an electric motor being placed inside the top cover and the bottom cover, supports pads being defined symmetrically at the inner walls of the top cover and the bottom cover, the pressure gauge connects with a cylinder cover by its connection module, the cylinder cover connecting with the integrative support cylinder by a seal part, a motor gear installed at the output shaft of the electric motor is mated with a gearing mechanism, the end of the gearing mechanism connecting with a piston by a piston shaft. The present invention adopts new materials and new process without increase of power, and can simplify structure on the basis of improving work efficiency.

FIELD OF THE INVENTION

The present invention relates to an air-compressor, particularly to a portable inflator for tyre.

BACKGROUND OF THE INVENTION

The current miniature inflator evolves unceasingly from the small air compressor. Since it is cheap and useful, the miniature inflator is developed rapidly and is widely used in car, coach, truck, rubber boat, air-cushion bed and balls. Due to the constraint of the power of automobile storage battery, the basic parameters of the miniature inflator, such as electric power, tyre-filled time, the maximal electric current, and the maximal pressure value, is restricted continuously during the development thereof.

SUMMARY OF THE INVENTION

To overcome the deficiency of the current technology, an object of the present invention is to provide a portable inflator for tyre which adopts new materials and new process without increase of power, can simplify structure and extend additional functions on the basis of improving work efficiency.

To achieve the above object, a portable inflator for tyre includes: a top cover, a bottom cover attached to the top cover, a pressure gauge, a switch and an accessories cover, the pressure gauge, the switch and the accessories cover being placed into the corresponding hole and trough which are defined in the top of the top cover and the bottom cover, an electric motor being placed inside the top cover and the bottom cover, supports pads being defined symmetrically at the inner walls of the top cover and the bottom cover, the pressure gauge connects with a cylinder cover by its connection module, the cylinder cover connecting with the integrative support cylinder by a seal part, a motor gear installed at the output shaft of the electric motor is mated with a gearing mechanism, the end of the gearing mechanism connecting with a piston by a piston shaft.

The connection module of the pressure gauge includes a connective base projecting from the bottom of the pressure gauge, a column seal groove integrally defined in the bottom of the connective base, and sealing rings disposed between the connective base inserting into the cylinder cover and the cylinder cover.

The integrative support cylinder includes the cylinder, the piston placed into the cylinder, an L-shaped support integrally extending from the bottom outer wall of the cylinder and perpendicular to the axis of the cylinder, a triangle stiffening rib integrally formed with the top of the L-shaped support and the outer wall of the cylinder, a sleeving hole of the electric motor output shaft and a sleeving hole of the gearing mechanism drive shaft respectively defined in the top and bottom of the L-shaped support, protruding parts each defined with a screw hole symmetrically protruding in the both ends of the sleeving hole of electric motor output shaft.

The gearing mechanism includes a deceleration gear nested in the drive shaft, a cam shaft inserted in the wrap hole projected from the center of the deceleration gear, a connecting rod nested in one end of the cam shaft, and an orienting hole defined in the top of connecting rod and perpendicular to the connecting rod for positioning the piston by the piston shaft being inserted in the piston and the orienting hole.

The present invention has the following advantages:

1. Adopting the integrative structure of the support and the cylinder which can improve the integrity of the compressor, increase the structural strength, reduce the weight, reduce the production cost, reduces the size of internal structure, and so make the portable inflator for tyre more portable.

2. Breakthroughing the traditional design, integrally forming the cam and the big drive gear, and replacing the traditional engineering plastics gear with the powder metallurgy gear.

3. Canceling the traditional independent structure attached to bearing, and employing the oily powder metallurgy part as the connecting rod, and so further reducing the production cost.

4. Using the O-shaped sealing ring in the pressure gauge, adopting the method of radial seal, and making use of the compaction strength of the casing reliably to seal the joint of the pressure gauge.

Other objects, advantages and novel features of the present invention will be drawn from the following detailed embodiment of the present invention with attached drawings, in which:

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an exploded view of the present invention;

FIG. 2 is a perspective view of a integrative support cylinder of the present invention;

FIG. 3 is a schematic view of a gearing mechanism of the present invention;

FIG. 4 is a schematic view of a connection module of a pressure gauge of the present invention; and

FIG. 5 is a profile of the FIG. 4.

DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIGS. 1-4, a portable inflator for tyre includes a top cover 11, a bottom cover 12 attached to the top cover 11, a pressure gauge 2, a switch 31 and an accessories cover 32. The pressure gauge 2, the switch 31 and the accessories cover 32 are placed into the corresponding hole 13, the corresponding trough 14 and the corresponding hole 15 which are defined in the top of the top cover 11 and the bottom cover 12. An electric motor 4 is placed inside the top cover 11 and the bottom cover 12. Supports pads 33 are defined symmetrically at the inner walls of the top cover 11 and the bottom cover 12. The pressure gauge 2 connects with a cylinder cover 5 by its connection module. The cylinder cover 5 connects with the integrative support cylinder by a seal part 51. A motor gear installed at the output shaft of the electric motor is mated with a gearing mechanism. The end of the gearing mechanism connects with a piston 8 by a piston shaft 81.

The connection module of the pressure gauge includes a connective base 211 projecting from the bottom of the pressure gauge 2, a sealing ring 213 disposed in a column seal groove 212 integrally defined in the bottom of the connective base 211, a spring 215 nested in a spring base 214, a square groove (not shown) defined in the cylinder cover 5 for containing the square connective base 212, a connecting pipe 51 attached with a gas tube joint 52 vertical defined in the sidewall of the cylinder cover 5, and a seal ring 216 disposed in the spring base 214.

The integrative support cylinder includes the cylinder 61, the piston 8 placed into the cylinder 61, an L-shaped support 62 integrally extending from the bottom outer wall of the cylinder 61 and perpendicular to the axis of the cylinder 61, a triangle stiffening rib 63 integrally formed with the top of the L-shaped support 62 and the outer wall of the cylinder 61, a sleeving hole 64 of the electric motor output shaft and a sleeving hole 66 of the gearing mechanism drive shaft respectively defined in the top and bottom of the L-shaped support 62, protruding parts 65 each defined with a screw hole 651 symmetrical protruding in the both ends of the sleeving hole 64 of electric motor output shaft.

The gearing mechanism includes a deceleration gear 72 nested in the drive shaft 71, a cam shaft 74 inserted in the wrap hole 73 projected from the center of the deceleration gear 72, a connecting rod 75 nested in one end of the cam shaft 74, and an orienting hole 76 defined in the top of connecting rod 75 and perpendicular to the connecting rod 75 for positioning the piston 8 by the piston shaft 81 being inserted in the piston 81 and the orienting hole 76.

In air inflation, the electric motor 4 is started, the gear 41 nested into the electric motor output shaft drives the deceleration gear 72 revolving, the cam shaft 74 connected with the deceleration gear 72 by the transmission of the connecting rod 75 drives the piston 8 placed into the cylinder 61 and doing work. The compression gas pass through the connecting pipe 51 defined in the sidewall of the cylinder cover 5, then through the gas tube joint 52 defined in the top of the connecting pipe 51 and connecting into all kinds of ballonet product to fill out.

While the preferred embodiment of the invention has been set forth for the purpose of disclosure, modifications of the disclosed embodiment of the invention as well as other embodiments thereof may occur to those skilled in the art. Accordingly, the appended claims are intended to cover all embodiments which do not depart from the spirit and scope of the invention. 

1. A portable inflator for tyre including a top cover, a bottom cover attached to the top cover, a pressure gauge, a switch and an accessories cover, the pressure gauge, the switch and the accessories cover being placed into the corresponding hole and trough which are defined in the top of the top cover and the bottom cover, an electric motor being placed inside the top cover and the bottom cover, supports pads being defined symmetrically at the inner walls of the top cover and the bottom cover, the pressure gauge connects with a cylinder cover by its connection module, the cylinder cover connecting with the integrative support cylinder by a seal part, a motor gear installed at the output shaft of the electric motor is mated with a gearing mechanism, the end of the gearing mechanism connecting with a piston by a piston shaft.
 2. The portable inflator for tyre of claim 1, wherein the connection module of the pressure gauge includes a connective base projecting from the bottom of the pressure gauge, a column seal groove integrally defined in the bottom of the connective base, and sealing rings disposed between the connective base inserting into the cylinder cover and the cylinder cover.
 3. The portable inflator for tyre of claim 1, wherein the integrative support cylinder includes the cylinder, the piston placed into the cylinder, an L-shaped support integrally extending from the bottom outer wall of the cylinder and perpendicular to the axis of the cylinder, a triangle stiffening rib integrally formed with the top of the L-shaped support and the outer wall of the cylinder, a sleeving hole of the electric motor output shaft and a sleeving hole of the gearing mechanism drive shaft respectively defined in the top and bottom of the L-shaped support, protruding parts each defined with a screw hole symmetrically protruding in the both ends of the sleeving hole of electric motor output shaft.
 4. The portable inflator for tyre of claim 1, wherein the gearing mechanism includes a deceleration gear nested in the drive shaft, a cam shaft inserted in the wrap hole projected from the center of the deceleration gear, a connecting rod nested in one end of the cam shaft, and an orienting hole defined in the top of connecting rod and perpendicular to the connecting rod for positioning the piston by the piston shaft being inserted in the piston and the orienting hole. 